US10094351B2 - Injector clip - Google Patents

Injector clip Download PDF

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Publication number
US10094351B2
US10094351B2 US15/621,357 US201715621357A US10094351B2 US 10094351 B2 US10094351 B2 US 10094351B2 US 201715621357 A US201715621357 A US 201715621357A US 10094351 B2 US10094351 B2 US 10094351B2
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US
United States
Prior art keywords
base plate
injector
fuel injection
lower plate
fuel
Prior art date
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Active
Application number
US15/621,357
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English (en)
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US20170356413A1 (en
Inventor
Seung Hyuk Oh
Young Il Kang
Kwang Won Koo
Myeong Hun Kweon
Yeon Jee Oh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hyundai Kefico Corp
Original Assignee
Hyundai Kefico Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hyundai Kefico Corp filed Critical Hyundai Kefico Corp
Assigned to HYUNDAI KEFICO CORPORATION reassignment HYUNDAI KEFICO CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANG, YOUNG IL, KOO, KWANG WON, KWEON, MYEONG HUN, OH, SEUNG HYUK, OH, YEON JEE
Publication of US20170356413A1 publication Critical patent/US20170356413A1/en
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Publication of US10094351B2 publication Critical patent/US10094351B2/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/803—Fuel injection apparatus manufacture, repair or assembly using clamp elements and fastening means; e.g. bolts or screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/853—Mounting of fuel injection apparatus involving use of quick-acting mechanism, e.g. clips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa

Definitions

  • the present disclosure relates to an injector clip, and more particularly, to an injector clip for attenuating load resulting from fuel injection of a fuel injection device.
  • a fuel injection device injects fuel that is compressed to a high pressure in a pump and delivers the fuel to a fuel rail and then to a combustion chamber of an engine.
  • the fuel injection device is subjected to force in a direction that corresponds to a fuel-injection direction and the fuel injection device operates in an unstable engagement state. Therefore, a component for attenuating load resulting from fuel injection of the fuel injection device and preventing rotation of the fuel injection device has been applied.
  • the component is required to have durability to withstand a fatigue fracture phenomenon occurs in a cyclic loading environment resulting from the fuel injection. Additionally, mechanical performance in an elastic region is required to sufficiently attenuate a reaction force. Accordingly, a large number of fixing clips for fuel injection devices have been developed.
  • an injector clip capable of reducing impact generated during fuel injection.
  • an injector clip may include a lower plate that supports a fuel injection portion of an injector, a base plate that engages and supports a connection portion of the injector, an engagement support portion that elastically supports the lower plate and the base plate to return a the fuel injection portion to an original position when the fuel injection portion is displaced, and a spring arm formed by extending from the base plate to support a fuel inlet portion of the injector.
  • the injector clip may include a lower spring arm formed by extending from the lower plate and being bent in a direction toward the base plate to reinforce supporting force of the engagement support portion.
  • the lower plate may be formed having a first end connected to the engagement support portion, an interior portion formed with a first seating aperture that seats the connection portion thereon and a second end is formed to be opened to communicate with the first seating aperture.
  • the lower plate may be formed having the connection portion inserted into the first seating aperture and that abuts an end face of the fuel injection portion in the direction of the fuel inlet portion to elastically support the fuel injection portion.
  • the base plate may be formed with a first end coupled to the engagement support portion, an interior portion formed with a second seating aperture that allows the connection portion to be seated thereon and a second end formed to be opened to communicate with the second seating aperture. Further, the base plate may be formed to receive the connection portion and may be supported by the second seating aperture.
  • the engagement support portion may be integrally formed with both the lower plate and the base plate and formed by being bent twice having the lower plate and the base plate disposed parallel with each other.
  • the spring arm may be formed having a first end coupled to the base plate and formed by being bent convexly with respect to the base plate and a second end in contact with the fuel inlet portion and formed having width of a face connected to the base plate greater than width of a face that abuts the fuel inlet portion.
  • the lower spring arm may be configured to be bent in a direction from the second end of the lower plate toward the base plate having the lower spring arm that covers a bottom face of the base plate or abuts the bottom surface of the base plate.
  • the injector clip according to an exemplary embodiment of the present disclosure may attenuate the load resulting from fuel injection and a fuel injection device may be prevented from rotating.
  • FIG. 1 is an exemplary perspective view of an injector clip according to an exemplary embodiment of the present disclosure
  • FIG. 2 is an exemplary side view of FIG. 1 according to an exemplary embodiment of the present disclosure
  • FIG. 3 is an exemplary bottom view of FIG. 1 according to an exemplary embodiment of the present disclosure
  • FIG. 4 is an exemplary perspective view of an injector clip according to an exemplary embodiment of the present disclosure
  • FIG. 5 is an exemplary side view of FIG. 4 according to an exemplary embodiment of the present disclosure.
  • FIG. 6 is an exemplary view of an injector clip according to an exemplary embodiment of the present disclosure when the injector clip is used.
  • a layer is “on” another layer or substrate, the layer may be directly on another layer or substrate or a third layer may be disposed therebetween.
  • vehicle or “vehicular” or other similar term as used herein is inclusive of motor vehicle in general such as passenger automobiles including sports utility vehicles (SUV), buses, trucks, various commercial vehicles, watercraft including a variety of boats, ships, aircraft, and the like and includes hybrid vehicles, electric vehicles, combustion, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other alternative fuel vehicles (e.g. fuels derived from resources other than petroleum).
  • motor vehicle in general such as passenger automobiles including sports utility vehicles (SUV), buses, trucks, various commercial vehicles, watercraft including a variety of boats, ships, aircraft, and the like and includes hybrid vehicles, electric vehicles, combustion, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other alternative fuel vehicles (e.g. fuels derived from resources other than petroleum).
  • SUV sports utility vehicles
  • plug-in hybrid electric vehicles e.g. fuels derived from resources other than petroleum
  • an injector clip may include a lower plate 10 , an engagement support portion 20 , a base plate 30 and a spring arm 40 .
  • the lower plate 10 may be coupled to the engagement support portion 20
  • the engagement support portion 20 may be coupled to the base plate 30
  • the base plate 30 may be coupled to the spring arm 40 .
  • the lower plate 10 may include a first seating aperture 11 and a first attachment or detachment recess 12 .
  • a first end of the lower plate 10 may be connected to the engagement support portion 20 .
  • the interior portion of the lower plate 10 may be formed with the first seating aperture 11 in the form of a circular aperture.
  • the second end of the lower plate 10 may be opened to communicate with the first seating aperture 11 .
  • the lower plate 10 may be formed with a horseshoe-shaped aperture.
  • the attachment or detachment recess 12 may be formed in the direction from the first seating aperture 11 toward the engagement support portion 20 .
  • a first end of the engagement support portion 20 may be coupled to the lower plate 10 and a second end of the engagement support portion may be coupled to the base plate 30 and may be formed in a semi-circular shape (e.g., “ ⁇ ”) shape by being bent twice.
  • the base plate 30 may include a second seating aperture 31 and a second attachment or detachment recess 32 .
  • a first end of the base plate 30 may be coupled to the engagement support portion 20 and the interior portion of the base plate 30 may be formed with the second seating aperture 31 in the form of a circular aperture. Further, the second end of the base plate 30 may be connected to the spring arm 40 and opened to communicate with the second seating aperture 31 .
  • the base plate 30 may be formed with a horseshoe-shaped aperture.
  • the first attachment or detachment recess 32 may be formed in the direction from the second seating aperture 31 toward the engagement support portion 20 .
  • the spring arm 40 may include a plate connection portion 41 and an injector contact portion 42 and may be formed having a pair of cantilevers formed by extending from the base plate 30 .
  • a first end of the spring arm 40 may be formed with the plate connecting portion 41 and a second end of the spring arm may be formed with the injector contact portion 42 .
  • the plate connection portion may be coupled to the base plate 30 and bent in a curved convex shape with respect to the base plate 30 . Width of the plate connection portion 41 may be greater than the width of the injector contact portion 42 .
  • shape of the injector clip may have the engagement support portion 20 formed by extending and being bent from the lower plate 10 .
  • the base plate 30 may be formed by being bent and extending from the engagement support portion 20 to be parallel with the lower plate 10 .
  • the spring arm 40 may be formed by being bent convexly with respect to the base plate 30 .
  • the lower plate 10 , the engagement support portion 20 , the base plate 30 and the spring arm 40 of injector clip according to the present disclosure may be made of a material having an elasticity property.
  • the injector may include a fuel injection portion 1 , a connection portion 2 and a fuel inlet portion 3 .
  • the fuel inlet portion 3 may be coupled to a fuel pipe (not shown).
  • the fuel inlet portion 3 at the opposite side of the fuel pipe (hereinafter, referred to as a downward direction) may be coupled to the connection portion 2 when the fuel injection portion 1 is connected to a lower side of the connection portion 2 .
  • the fuel inlet portion 3 , the connection portion 2 and the fuel injection portion 1 may be connected linearly on a common axis.
  • the lower plate 10 may be supported on the upper end face of the fuel injection portion 1 and then the spring arm 40 may be inserted underneath the lower end face of the fuel inlet 3 .
  • the present disclosure has a feature that height h 1 from the injector engagement portion 42 of the spring arm 40 to the lower plate 10 is formed to be larger than height h 2 between the fuel injection portion 1 and the fuel inlet portion 3 (h 1 >h 2 ).
  • height h 1 from the injector engagement portion 42 to the lower plate 10 may be 2 mm greater than height h 2 between the fuel injection portion 1 and the fuel inlet portion 3 . Therefore, the injector clip according to the present disclosure may be inserted between the fuel inlet portion 3 and the fuel injection portion 1 while being compressed.
  • the injector clip according to an exemplary embodiment of the present disclosure may be disposed to have the connection portion 2 seated on the first seating aperture 11 and the second seating aperture 31 .
  • an interval between a pair of plate engagement portions 41 may be formed to be less than the diameter of the connection portion 2 . Therefore, the connection portion 2 may be inserted into and seated on both the first seating aperture 11 and the second seating aperture 31 while the plate engagement portions 41 are spread out with respect to both the first attachment or detachment recess 12 and the second attachment or detachment recess 32 .
  • the connection portion 2 may be coupled to and disposed between the lower plate 10 and the base plate 30 .
  • the lower plate 10 may be inserted into the lower side of the connection portion 2 and may abut the upper end face of the fuel injection portion 1 .
  • the base plate 30 may be inserted into and engaged with the middle position of the connection portion 2 .
  • the spring arm 40 may abut the lower face of the fuel inlet portion 3 . Accordingly, when the injector clip is inserted into the injector, the lower plate 10 may elastically support the fuel injection portion 1 .
  • the base plate 30 may fix the position of the connection portion 2 and the spring arm 40 may elastically support the fuel inlet portion 3 .
  • the spring arm 40 and the lower plate 10 may elastically support the fuel inlet portion 3 and the fuel injection portion 1 , respectively.
  • the fuel injection portion 1 may be pressed and pushed toward an upward direction due to reaction resulting from injection of fuel. Accordingly, the fuel injection portion 1 may be displaced toward the upward direction along the connection portion 2 .
  • the spring arm 40 and the lower plate 10 may be compressed in both directions with respect to the base plate 30 .
  • the restoring force of the spring arm 40 and the lower plate 10 may move the fuel injection portion 1 and the fuel inlet portion 3 back to a position before fuel is injected.
  • an effect of dispersing momentum of impact may be obtained by employing the plate 30 that engages with and supports the connection portion 2 .
  • connection portion 2 may abut the base plate 30
  • fuel inlet portion 3 may be elastically supported by the spring arm 40 and the lower plate 10
  • base plate 30 and the spring arm 40 may be integrally formed, and the fuel injection portion 1 and the connection portion 2 and the fuel inlet portion 3 may be prevented from rotating with respect to each other.
  • FIGS. 4 and 5 show an exemplary embodiment of an injector clip according to the present disclosure.
  • the injector clip according to this exemplary embodiment may include a lower spring arm 150 formed to extend from the lower plate 110 and to be bent in a direction toward the base plate 130 (e.g., in an upward direction).
  • the lower spring arm 150 when the lower spring arm 150 is configured to be proximate to or in contact with the bottom surface of the base plate 130 , the same effect two springs connected in parallel between the base plate 130 and the lower plate 110 may be generated. In other words, an effect of reinforcing coupling force of the engagement support portion 120 may be generated to reduce the impact of injecting fuel.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
US15/621,357 2016-06-13 2017-06-13 Injector clip Active US10094351B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2016-0073172 2016-06-13
KR1020160073172A KR101739694B1 (ko) 2016-06-13 2016-06-13 인젝터 클립

Publications (2)

Publication Number Publication Date
US20170356413A1 US20170356413A1 (en) 2017-12-14
US10094351B2 true US10094351B2 (en) 2018-10-09

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Application Number Title Priority Date Filing Date
US15/621,357 Active US10094351B2 (en) 2016-06-13 2017-06-13 Injector clip

Country Status (4)

Country Link
US (1) US10094351B2 (zh)
KR (1) KR101739694B1 (zh)
CN (1) CN107489573B (zh)
DE (1) DE102017209820B4 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180372045A1 (en) * 2017-06-23 2018-12-27 Hyundai Kefico Corporation Clip for injector
US11242833B2 (en) * 2016-10-12 2022-02-08 Vitesco Technologies GmbH Injector cup, spring clip, and fluid injection assembly
US20230139829A1 (en) * 2020-04-14 2023-05-04 Pittway Sarl Mounting Clip to Mount an Actuator Unit to a Valve Unit and Assembly Having an Actuator Unit, a Valve Unit and a Mounting Clip

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6380185B2 (ja) * 2015-03-23 2018-08-29 株式会社デンソー 燃料噴射弁用クリップおよび燃料噴射弁ユニット
EP3279463A1 (en) * 2016-08-04 2018-02-07 Continental Automotive GmbH A fuel injection assembly for an internal combustion engine
KR20190001367A (ko) 2017-06-27 2019-01-04 주식회사 현대케피코 연료레일 인젝터 고정 구조
US11873786B2 (en) * 2021-10-19 2024-01-16 Stanadyne Operating Company Llc Axisymmetric injector hold-down load ring

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US5501195A (en) * 1994-09-16 1996-03-26 Siemens Automotive Corporation Retainer arrangement for a bottom feed fuel injector
US5893351A (en) * 1996-10-15 1999-04-13 Denso Corporation Fuel supply device having slip-out preventing member and method for assembling the same
US5970953A (en) 1999-01-12 1999-10-26 Siemens Automotive Corporation High pressure injector clip
US7063075B2 (en) * 2001-10-24 2006-06-20 Robert Bosch Gmbh Fixing device
US8408184B2 (en) * 2009-02-18 2013-04-02 Continental Automotive Gmbh Fastening element and fluid injector assembly
US8707930B2 (en) * 2008-05-30 2014-04-29 Robert Bosch Gmbh Hold-down device for a fuel injection device
KR20150007263A (ko) 2013-07-10 2015-01-20 콘티넨탈 오토모티브 게엠베하 연소 엔진용 연료 분사 어셈블리

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WO2006092427A1 (de) 2005-03-03 2006-09-08 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung
EP1892408B1 (en) 2006-08-21 2009-10-21 Continental Automotive GmbH Injector, fuel cup and holder
US8047183B2 (en) * 2009-05-29 2011-11-01 Cummins Intellectual Properties, Inc. Fuel injector, clamping assembly and method of mounting a fuel injector
US9115679B2 (en) 2012-02-01 2015-08-25 Denso International America, Inc. Mounting point injector clip
EP2860388B1 (en) 2013-10-10 2017-07-26 Continental Automotive GmbH Fluid injection assembly for a combustion engine
US20160025056A1 (en) * 2014-07-22 2016-01-28 Ford Global Technologies, Llc Diesel fuel injector clamp

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5501195A (en) * 1994-09-16 1996-03-26 Siemens Automotive Corporation Retainer arrangement for a bottom feed fuel injector
US5893351A (en) * 1996-10-15 1999-04-13 Denso Corporation Fuel supply device having slip-out preventing member and method for assembling the same
US5970953A (en) 1999-01-12 1999-10-26 Siemens Automotive Corporation High pressure injector clip
US7063075B2 (en) * 2001-10-24 2006-06-20 Robert Bosch Gmbh Fixing device
US8707930B2 (en) * 2008-05-30 2014-04-29 Robert Bosch Gmbh Hold-down device for a fuel injection device
US8408184B2 (en) * 2009-02-18 2013-04-02 Continental Automotive Gmbh Fastening element and fluid injector assembly
KR20150007263A (ko) 2013-07-10 2015-01-20 콘티넨탈 오토모티브 게엠베하 연소 엔진용 연료 분사 어셈블리

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11242833B2 (en) * 2016-10-12 2022-02-08 Vitesco Technologies GmbH Injector cup, spring clip, and fluid injection assembly
US20180372045A1 (en) * 2017-06-23 2018-12-27 Hyundai Kefico Corporation Clip for injector
US11459989B2 (en) * 2017-06-23 2022-10-04 Hyundai Kefico Corporation Clip for injector
US20230139829A1 (en) * 2020-04-14 2023-05-04 Pittway Sarl Mounting Clip to Mount an Actuator Unit to a Valve Unit and Assembly Having an Actuator Unit, a Valve Unit and a Mounting Clip

Also Published As

Publication number Publication date
US20170356413A1 (en) 2017-12-14
KR101739694B1 (ko) 2017-05-24
CN107489573B (zh) 2020-08-25
DE102017209820B4 (de) 2023-10-26
CN107489573A (zh) 2017-12-19
DE102017209820A1 (de) 2017-12-14

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